Mr. smith has 28 sixth graders and 35 seventh graders. if he wants to break the two grades into identically sized groups without any students left over, how many students should be in a group

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?